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Titolo:
Causes of species diversity differences: a comparative analysis of Markov models
Autore:
Wootton, JT;
Indirizzi:
Univ Chicago, Dept Ecol & Evolut, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 pt Ecol & Evolut, Chicago, IL 60637 USA
Titolo Testata:
ECOLOGY LETTERS
fascicolo: 1, volume: 4, anno: 2001,
pagine: 46 - 56
SICI:
1461-023X(200101)4:1<46:COSDDA>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORAL REEFS; COMPETITION; DISTURBANCE; RECRUITMENT; COMMUNITY; PREDATION; DYNAMICS; FOREST; MAINTENANCE; PATTERNS;
Keywords:
biodiversity; coral reef; disturbance; intertidal; mussel bed; transition probability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
60
Recensione:
Indirizzi per estratti:
Indirizzo: Wootton, JT Univ Chicago, Dept Ecol & Evolut, 1101 E 57th St, Chicago, IL 60637 USA Univ Chicago 1101 E 57th St Chicago IL USA 60637 IL 60637 USA
Citazione:
J.T. Wootton, "Causes of species diversity differences: a comparative analysis of Markov models", ECOL LETT, 4(1), 2001, pp. 46-56

Abstract

While many dynamic processes have been proposed to produce diversity differences among communities, most empirical investigations focus on static system attributes. hn ideal analysis would consider multiple dynamic processesand their impact on many community members, but such analyses can be logistically daunting. I compared Markov chain models of ecological communities to explore general processes leading to diversity differences of sessile species between coral reefs and rocky intertidal mussel beds. As predicted bydiversity theory, high diversity coral reefs had lower species replacementprobabilities and higher disturbance rates than did lower diversity musselbeds. Intransitivities in species replacements, recruitment limitation andresponses to perturbing species from equilibrium (Jacobian elements) did not differ significantly between systems. Tradeoffs between the displacementrisk or displacement ability of a species and either disturbance risk or colonising ability were not apparent. Manipulating the coral reef model to eliminate disturbance or intransitivities caused declines in species diversity, whereas removing recruitment limitation or increasing the probability of interspecific replacement did not. Higher overall disturbance levels can explain part of the diversity difference between systems, but much remainedunexplained, indicating that details of the pattern and strengths of species interactions were probably extremely important.

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Documento generato il 03/04/20 alle ore 03:45:14